Intermatic
Intermatic FF15MC Spring-Wound Timer 15 A 120/277 V AC Silver
Spring-wound timer controls one circuit at 15 A across 120/277 V AC with 1 hp at 120 V and 2 hp at 240 V
- Spring-wound operation needs no external power
- 15 A rating handles motors up to 1 hp at 120 V
- 2 hp motor capacity at 240 V extends versatility
- 120/277 V AC input suits residential and commercial panels
- Single-gang design fits standard electrical boxes
Spring-Wound Timer for Motor Control
The Intermatic FF15MC is a spring-wound timer rated at 15 A for 120/277 V AC circuits. It provides a single-gang mechanical timing function suited for controlling motors and lighting loads in commercial or industrial electrical installations. The device operates without external power, relying on a wound spring mechanism to open and close contacts.
Silent Operation with No Standby Draw
Because the timer uses a purely mechanical spring-wound movement, it produces no electrical hum or fan noise during operation. It draws zero standby power when the circuit is open, and its silver finish resists corrosion in standard indoor electrical enclosures. The 1 hp rating at 120 V and 2 hp at 240 V define its normal motor-load capacity.
Consistent Timing Under Continuous Duty
Under sustained load the spring mechanism maintains its set interval without thermal drift, unlike electronic timers that can vary with temperature. The mechanical contacts are rated for the full 15 A resistive or inductive load continuously, so the timer does not derate during long ON periods. It is not suited for applications requiring programmable schedules, multiple daily events, or battery-backed timekeeping.
Highlights
- Spring-wound operation needs no external power
- 15 A rating handles motors up to 1 hp at 120 V
- 2 hp motor capacity at 240 V extends versatility
- 120/277 V AC input suits residential and commercial panels
- Single-gang design fits standard electrical boxes
Specifications
| Brand | INTERMATIC |
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Questions about this item
How do I wire the Intermatic FF15MC spring-wound timer into a 120/277 V AC circuit?
Connect the line and load conductors to the timer terminals rated for 15 A at 120/277 V AC, ensuring the supply voltage matches the timer rating and the circuit breaker protects the 15 A rating.
What maintenance does the spring-wound mechanism need over time?
The mechanical spring winding requires no lubrication; periodically verify the timer cycles cleanly and the contacts show no pitting or carbon build-up from the 1 hp at 120 V or 2 hp at 240 V loads.
What is the first limit reached when the timer runs a continuous 15 A load?
The 15 A contact rating is the limiting factor; sustained current above 15 A will overheat the contacts before the spring mechanism or voltage rating becomes an issue.
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